When Intel says is supports RST on linux it dont mean much

Intel supports RST from kernel 2.6. It did not work for me yesterday. I tried with Fedora 33. Supports means that mdadm can read the volume information. Then mdadm can create raid drives. Looks like it is better to turn it off in linux. I tried windows 10 and it work just like i expected it to do. When installing Windows i could chose the volume i had created in the UEFI settings. I could install some software where i could see information about the RAID drive.